Printing-block for block-printing machines



R. G. MCKSON.

PRINTING BLOCK FOR BLOCK PRINTING MACHINES. APPLICATION FILED mms, 1920.

1,386,504. Patented g- 2, 1921.

W W 7 IMM- Z f7 gm; E WM; .fwcffaon. 6 P 5 6 W 7 kwflfiomyfi 5 5L9 MW UNITED STATES PATENT OFFICE.

RALPH G. JACKSON, OF CHESTER, PENNSYLVANIA, ASSIGNOR T0 CONGOLEUM'. COM- IPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PRINTING-BLOCK FOR BLOCK-PRINTING MACHINES.

Specification of Letters Patent.

Patented Aug. 2, 1921.

Application filed January 16, 1920. Serial No. 351,874.

To all whom it may concern:

.Be it known that I, RALPH G. J AOKSON, a citizen of the United States, residing in Chester, Delaware county, Pennsylvania, have invented certain Improvements in Printing-Blocks for Block-Printing Machines, of which the following is a specification.

My invention relates to certain improvements in the printing of floor coverings, such as oil cloth and like materials, in which a pattern of two or more colors is printed and in which lines are used to separate the different colors. It is especially applicable in making designs imitating tiles or inlaid linoleum. I

The object of my invention is to make a sharp dividing line between the two colors.

Heretoformin the printing of designs, it was difficult to make a perfect print owing to the fact that the blocks would not register correctly in some instances, or the pigment would vary to such an extent as to make imperfect work and form a ragged joint. In some cases, one color would run into another. A single separating line, such as heretofore used, would not cover these defects, and the line when printed would be more or less uneven.

In the accompanying drawings:

Figure 1 is a plan view of a floor covering with a design in two colors printed thereon;

Fig. 2 is a view, similar to F ig, 1, showing the dividing line made in accordance with my invention;

Fig. 3 is a sectional view of the printing block for the dividing line;

Fig. 4 is an inverted plan view of said block;

Figs. 5, 6 and 7 are diagram views showing the different steps in the process of printing, and

Fig. 8 is a view of a modification.

The material to be printed is either a felt or a fabric having a paint coating thereon of sufficient thickness to form a body. Then the design is printed on this surface. In the present instance, the design is a checkered design consisting of a series of squares in two colors. 1 are the squares of one color and 2 are the squares of another color. These two colors are printed as close together as possible, leaving a very narrow space 3 between the impressions as shown in Fig. 1, so that one color will not run into the other. Usually, a narrow line is printed over this narrow space with a single rule and while it is effective to outline the blocks it does not give a sharp line of distinction between the colors, as, in some instances, one color is liable to run into another, or the line may be ragged beyond the narrow rule line.

I have found that instead of making a line with a rule having a single impression face that if two rules are used, placed comparatively close together so that a body of pigment can be held in the space between the rules, I can make a perfect line and one in which the edges are sharp. Consequently, the designs are well defined.

Referring to Figs. 3 and 4., 5 is a printing block of the usual type. 6 are the rules arranged in pairs and placed comparatively close together, leaving a narrow space 7. These rules overlap the two adjoining designs so that when the rule, Fig. 5, is supplied with pigment, as in Fig. 6, a certain quantity of the pigment is held between the two rules, and when the impression is made, as in Fig. 7, this pigment is deposited and the edges of the impression are sharp, as the v pigment does not ooze out between the rule and the design. Any excess of pigment will extend into the space so that the line 4 while somewhat wider than the single line, is a perfect line, giving a clean cut appearance to the printed floor covering.

In Fig. 8 I have illustrated a modification in which a single rule is used having a deep groove therein forming two impression faces,-the pigment being held in the groove. While in Figs. 1 and 2, I have shown a rectangular design, it will be understood that the design may be varied without departing from the essential features of the invention.

- I claim v A rule for applying a body of pigment to a surface in a single line, said rule having two narrow surfaces separated by a groove of such depth as to hold a given amount of pigment so that, when an impression is made, the pigment will be deposited, leaving the edges of the impression comparatively sharp.

RALPH G. JACKSON. 

